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by josheeg
Sat Aug 18, 2018 1:44 pm
Forum: FEM
Topic: Assembly2 assembly meshing of boolion unioned parts min size .1 in or .05" in never seems to finish windows shows not re
Replies: 33
Views: 1932

Re: Assembly2 assembly meshing of boolion unioned parts min size .1 in or .05" in never seems to finish windows shows no

The four electric motors are on the end of the two forward most stalks then two tubes are for the main wings then the stalks behind the wings and two tubes are for the tail. I was considering some kind of foam from wecutfoam.com flying foam has been down. But once the structure is tested to handle t...
by josheeg
Thu Aug 16, 2018 8:25 am
Forum: FEM
Topic: Assembly2 assembly meshing of boolion unioned parts min size .1 in or .05" in never seems to finish windows shows not re
Replies: 33
Views: 1932

Re: Assembly2 assembly meshing of boolion unioned parts min size .1 in or .05" in never seems to finish windows shows no

Well why won't my model simulate? if your tutorial is on simulating forces on a model? I would like to try cfd workbench that looks good. But wouldn't I need to have the skeleton work? I am new to design of something like this so I do not have a checklist. According to your FEM help-request in this ...
by josheeg
Wed Aug 15, 2018 5:20 pm
Forum: FEM
Topic: Use European standard in switzerland
Replies: 24
Views: 1720

Re: Use European standard in switzerland

Wow I am impressed with your use of freecad fem module. I am trying to get some assistance on it in this thread I would appreciate if anyone would take a look. :ugeek: :geek:

https://forum.freecadweb.org/viewtopic. ... ead#unread
by josheeg
Wed Aug 15, 2018 4:32 pm
Forum: FEM
Topic: Assembly2 assembly meshing of boolion unioned parts min size .1 in or .05" in never seems to finish windows shows not re
Replies: 33
Views: 1932

Re: Assembly2 assembly meshing of boolion unioned parts min size .1 in or .05" in never seems to finish windows shows no

I do not have much experience making model airplanes and the large size is to test myles loyds crosswind kite power calculations as a technical curiosity. But I also don't know if the foam over the carbon fiber poles would be strong enough or fold. That is why to try this cost effectivly on a projec...
by josheeg
Wed Aug 15, 2018 4:17 pm
Forum: FEM
Topic: Assembly2 assembly meshing of boolion unioned parts min size .1 in or .05" in never seems to finish windows shows not re
Replies: 33
Views: 1932

Re: Assembly2 assembly meshing of boolion unioned parts min size .1 in or .05" in never seems to finish windows shows no

yes it is 5220mm or 204" inches. there would probably need to be 48" in segments instead of 98 as max size so it could screw apart and go in my car. :lol:
kwp20048segforcar.png
kwp20048segforcar.png (147.88 KiB) Viewed 472 times
by josheeg
Wed Aug 15, 2018 4:03 pm
Forum: FEM
Topic: Assembly2 assembly meshing of boolion unioned parts min size .1 in or .05" in never seems to finish windows shows not re
Replies: 33
Views: 1932

Re: Assembly2 assembly meshing of boolion unioned parts min size .1 in or .05" in never seems to finish windows shows no

Hi I got factory specs that could go into kicad fem. I figured it would help even if I tried a hand calculation. density ~1700 kg/m^3 modulus ~34 Msi (~230 GPa) poisson ration 0.2 or higher m Good Morning Joshua, Thank you for your email. We appreciate your interest in DragonPlate. Without knowing w...
by josheeg
Thu Aug 09, 2018 4:57 am
Forum: FEM
Topic: Assembly2 assembly meshing of boolion unioned parts min size .1 in or .05" in never seems to finish windows shows not re
Replies: 33
Views: 1932

Re: Assembly2 assembly meshing of boolion unioned parts min size .1 in or .05" in never seems to finish windows shows no

:D :lol: I have been reading the papers on cross wind kite power systems. I found my 3d robotics drone kit was fun. The pixhawk mini px4 has a VTOL plane configuration so I wanted to mount 4 motors on the 24" .5" tubes the carbon fiber props for drones I seen the largest were 30". Dragon plate carbo...
by josheeg
Wed Aug 08, 2018 5:30 pm
Forum: FEM
Topic: Assembly2 assembly meshing of boolion unioned parts min size .1 in or .05" in never seems to finish windows shows not re
Replies: 33
Views: 1932

Re: Assembly2 assembly meshing of boolion unioned parts min size .1 in or .05" in never seems to finish windows shows no

The force on other systems is 3100 newtons.

1/16 of that 194 newtons

and 620 newtons would be tests I would wonder how the tubes would be effected.

the material properties would be
density
460 kg/mm^3
youngs model 34000000 psi
poisson ratio 0.20

How would I do the hand calculations?
mat.png
mat.png (194.7 KiB) Viewed 586 times
by josheeg
Wed Aug 08, 2018 1:28 pm
Forum: FEM
Topic: Assembly2 assembly meshing of boolion unioned parts min size .1 in or .05" in never seems to finish windows shows not re
Replies: 33
Views: 1932

Re: Assembly2 assembly meshing of boolion unioned parts min size .1 in or .05" in never seems to finish windows shows no

Ok Freecad 0.17 stable release
windows 10
This is the assembly
frame_VTOL_Plane_union_analysis.FCStd
(227.32 KiB) Downloaded 14 times
I only seen tutorials in gmesh.

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